What you are hearing is plain old sound - higher frequency, in the ranges we tend to lose first with time and age. In both the TV and light fixtures, you are hearing the transformer coils physically shifting.
I hear them too.
Tooth fillings and bone conduction could pick up AM signals, because of the nature of AM.
I hear them too.
Tooth fillings and bone conduction could pick up AM signals, because of the nature of AM.